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Security audit

diagram-maker

Security checks for vulnerabilities and agentic risk

Overview

This diagram-making skill is a simple local diagram generator with no evidence of hidden execution, network use, credential handling, or persistence.

Before installing, know that this skill is intended to create local diagram files such as diagram.html or diagram.excalidraw. Review generated diagrams before sharing them, but the inspected artifact does not show network access, credential use, persistence, or unsafe automatic execution.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · references/svg-template.md (reported line 3)May include surrounding context.

SVG HTML Template

Copy this to a .html file and replace <!-- SVG -->.

html
<!doctype html>